Sweet, me likes, how about a dyno sheet?
the previous owner had it posted on LS2gto.com
514rwhp and 489rwTQ at 5psi on pump gas.
Add 17% for drivetrain loss and that's roughly 600HP to the fly.
It's very believable based on the short list of cars that became my bitches:
GTR
E55
CLS55
Every M-series BMW
All porsches except the CGT (which will kill me with the older HP, but not newer anticipated HP).
Gallardo
2009 CTS-V super charged
and a few more.
I wanted something that seats 4 with 2 doors, have ALOT of aftermarket support, sips gas during cruising, and gives me the most bang for the buck.
If you combine all of that, the GTO was the only option at the time.
I spent $24k (like the NSX) with 20k miles 7year/75k miles bumper to bumper GMPP extended warranty with $10k worth of 600HP upgrades.
Nothing can beat that deal.
Trust me, getting a good taste of all that flat power band is like a drug.
Sorta like the "once u go black, u don't go back" motto for women.......